package summer_vacation.qiuyangyang;
import java.util.Scanner;
/**
 * Created by Administrator on 2015/8/21 0021.
 */
public class Assignment_04 {
    public static void main(String[] args) {
        System.out.println("请输入你的成绩：");
        Scanner input=new Scanner(System.in);
        int i=input.nextInt();
        if(i>=90){
            System.out.println("A");
        }else if(i>=80){
            System.out.println("B");
        }else if(i>=70){
            System.out.println("C");
        }else if(i>=60){
            System.out.println("D");
        }else{
            System.out.println("E");
        }
    }
}
